FOLFOX/Bevacizumab +/- MK-0646 in Metastatic Colorectal Cancer

Participants randomized to ARM A will receive modified FOLFOX 7 every other week + MK-0646 every week: 5-FU 400 mg/m2 by intravenous infusion over 2-5 minutes Leucovorin 400 mg/m2 by intravenous infusion over 2 hours Oxaliplatin 85 mg/m2 by intravenous infusion over 2 hours (with leucovorin) Bevacizumab 5 mg/kg by intravenous infusion over 30 minutes (+/- 15 minutes) following infusions may be given over 10 minutes (+/- 10 minutes) if the first infusion is tolerated well. 5-FU 2400 mg/m2 by continuous intravenous infusion over 46 hours (may be delivered via automated outpatient pump) Antiemetics (drugs that prevent nausea and vomiting): 5-HT3 receptor antagonist (e.g. ondansetron) and dexamethasone are recommended prior to chemotherapy. MK-0646 10 mg/kg by intravenous infusion over 60 minutes every week (participants larger than 100 kg \[220 pounds\] will receive their infusions over 120 minutes). Participants randomized to ARM B will receive modified FOLFOX 7 every other week + placebo every week: 5-FU 400 mg/m2 by intravenous infusion over 2-5 minutes Leucovorin 400 mg/m2 by intravenous infusion over 2 hours Oxaliplatin 85 mg/m2 by intravenous infusion over 2 hours (with leucovorin) Bevacizumab 5 mg/kg by intravenous infusion over 30 minutes (+/- 15 minutes); following infusions may be given over 10 minutes (+/- 10 minutes) if the first infusion is tolerated well. 5-FU 2400 mg/m2 by continuous intravenous infusion over 46 hours (may be delivered via automated outpatient pump) Antiemetics: 5-HT3 receptor antagonist (e.g. ondansetron) and dexamethasone are recommended prior to chemotherapy Placebo by intravenous infusion over 60 minutes every week (participants larger than 100 kg \[220 pounds\] will receive their infusions over 120 minutes).